No, I think it would do my head in.
It's ok to go for a shorter period, seeing new things every day, meeting new people every day, but gradually a strong desire arises to converse with someone in your own language, a meaningful conversation rather than just a garbled multilingual communication supported with a form of sign language in order to find the nearest camp site, hostel or water source.
Finding a travel buddy might work if you have known the other person for some time, but cycling long term with someone who has answered an ad to 'Cycle with me around the world', no thanks.
